#include<iostream>
#include<Eigen/Dense>
using namespace Eigen;
using namespace std;
int main(){
	Eigen::Matrix3d mat1,mat2;
	mat1<<1,0,0,0,1,0,0,0,1;
	mat2<<3,0,0,0,3,0,0,0,3;
	std::cout<< mat1*mat2<<std::endl;




	return 0;	}
